Lamp bulb



FIG. 1 is a first perspective view of a first embodiment of a lamp bulb showing my design;

FIG. 2 is a second perspective view of the first embodiment thereof;

FIG. 3 is a front view of the first embodiment thereof;

FIG. 4 is a back view of the first embodiment thereof;

FIG. 5 is a left side view of the first embodiment thereof;

FIG. 6 is a right side view of the first embodiment thereof;

FIG. 7 is a top view of the first embodiment thereof;

FIG. 8 is a bottom view of the first embodiment thereof;

FIG. 9 is a first perspective view of a second embodiment of a lamp bulb showing my design;

FIG. 10 is a second perspective view of the second embodiment thereof;

FIG. 11 is a front view of the second embodiment thereof;

FIG. 12 is a back view of the second embodiment thereof;

FIG. 13 is a left side view of the second embodiment thereof;

FIG. 14 is a right side view of the second embodiment thereof;

FIG. 15 is a top view of the second embodiment thereof; and,

FIG. 16 is a bottom view of the second embodiment thereof. 

CLAIM The ornamental design for a lamp bulb, as shown and described. 